Question 1

In the statement below, amount is referred to as the ____ parameter.
public void deposit(double amount)

Accepted Answer

A) private 
B) public 
C) explicit 
D) implicit 
A) private 
B) public 
C) explicit 
D) implicit

Question 2

Which of the following corresponds to a valid constructor header for the Player class?

Accepted Answer

A) public Player() 
B) public int Player 
C) public void Player() 
D) private void Player() 
A) public Player() 
B) public int Player 
C) public void Player() 
D) private void Player()

Question 3

The black boxes from which a program is manufactured are called ___.

Accepted Answer

A) objects 
B) access specifiers 
C) methods 
D) instance variables 
A) objects 
B) access specifiers 
C) methods 
D) instance variables

Question 4

Consider the following method comment and method header:   Fill in the blank.

Accepted Answer

A) return double 
B) return 
C) @return double 
D) @return 
A) return double 
B) return 
C) @return double 
D) @return

Question 5

Fill in the first line of this SquareTester program so that it declares and initializes a variable mySquare as an instance of a Square class with a side length of 6.

Accepted Answer

A) Square mySquare = new Square(6); 
B) mySquare = new Square(6); 
C) mySquare = Square(6); 
D) Square mySquare = Square(6); 
A) Square mySquare = new Square(6); 
B) mySquare = new Square(6); 
C) mySquare = Square(6); 
D) Square mySquare = Square(6);

Question 6

Assume the method below has been added to the BankAccount class.

Accepted Answer

A) 110.0 
B) 100.0 
C) 105.0 
D) 115.0 
A) 110.0 
B) 100.0 
C) 105.0 
D) 115.0

Question 7

We want to create a class that represents a date.A date has a day, month, and year.For example, the date March 16, 2014 has the day 16, month 3, and year 2014.The basic framework of a date class is below:   Which of the constructor specifications below will allow this code to behave as desired?

Accepted Answer

A) public void Date (int d, int m, int y) 
B) public init (int d, int m, int y) 
C) public Date (int d, int m, int y) 
D) public Date Date (int d, int m, int y) 
A) public void Date (int d, int m, int y) 
B) public init (int d, int m, int y) 
C) public Date (int d, int m, int y) 
D) public Date Date (int d, int m, int y)

Question 8

What will be output from the following statements that use BankAccount class?

Accepted Answer

A) 150.0 200.0 250.0 
B) 250.0 250.0 250.0 
C) 250.0 150.0 200.0 
D) 250.0 200.0 250.0 
A) 150.0 200.0 250.0 
B) 250.0 250.0 250.0 
C) 250.0 150.0 200.0 
D) 250.0 200.0 250.0

Question 9

What is a tester class?

Accepted Answer

A) A class that constructs objects. 
B) A class that invokes one or more methods. 
C) A class that is named Tester. 
D) A class with a main method that contains statements to run methods of another class. 
A) A class that constructs objects. 
B) A class that invokes one or more methods. 
C) A class that is named Tester. 
D) A class with a main method that contains statements to run methods of another class.

Question 10

.Consider the following method comment and method header:   Fill in the blank.

Accepted Answer

A) @param 
B) param 
C) @parameter 
D) parameter 
A) @param 
B) param 
C) @parameter 
D) parameter

Question 11

We want to create a class that represents a geometric sequence.A geometric sequence is a sequence of numbers that begin at some value and then multiplies each value by some constant to get the next value.For example, the geometric sequence 1, 2, 4, 8, 16 starts at 1 and multiplies each term by 2 to get the next.The geometric sequence 10.8, 5.4, 2.7, 1.35 starts at 10.8 and multiplies each term by 0.5 to get the next.The basic framework of a geometric sequence class is below:

Accepted Answer

A) public next() : double 
B) public int next() 
C) public void next(double result) 
D) public double next() 
A) public next() : double 
B) public int next() 
C) public void next(double result) 
D) public double next()

Question 12

What is the name of the parameter variable of the recordPurchase method of the CashRegister class?

Accepted Answer

A) amount 
B) payment 
C) purchase 
D) change 
A) amount 
B) payment 
C) purchase 
D) change

Question 13

What verifies that a class works correctly in isolation, outside a complete program?

Accepted Answer

A) unit test 
B) encapsulation 
C) abstraction 
D) enumeration
Å¯Difficulty
Easy 
A) unit test 
B) encapsulation 
C) abstraction 
D) enumeration
Å¯Difficulty
Easy

Question 14

Which line of code is part of the private implementation of the BankAccount class?

Accepted Answer

A) public BankAccount() 
B) balance = balance - amount; 
C) public void deposit(double amount) 
D) public void withdraw(double amount) 
A) public BankAccount() 
B) balance = balance - amount; 
C) public void deposit(double amount) 
D) public void withdraw(double amount)

Question 15

Which of the following corresponds to the getArea method body for a Square class where the instance variable is named sideLength?

Accepted Answer

A) return sideLength; 
B) return area; 
C) return width * height; 
D) return sideLength * sideLength; 
A) return sideLength; 
B) return area; 
C) return width * height; 
D) return sideLength * sideLength;

Question 16

Fill in the blank in the following method comment.

Accepted Answer

A) amount 
B) balance 
C) double amount 
D) money 
A) amount 
B) balance 
C) double amount 
D) money

Question 17

What is a local variable?

Accepted Answer

A) A variable that is declared in the header of a class. 
B) A variable that is declared in the body of the class. 
C) A variable that is declared in the header of a method. 
D) A variable that is declared in the body of a method. 
A) A variable that is declared in the header of a class. 
B) A variable that is declared in the body of the class. 
C) A variable that is declared in the header of a method. 
D) A variable that is declared in the body of a method.

Question 18

Consider the following method header:   Fill in the blank in the javadoc comment:

Accepted Answer

A) @param rate the rate of interest 
B) @parameter rate the rate of interest 
C) @param interestRate the rate of interest 
D) @parameter interestRate the rate of interest 
A) @param rate the rate of interest 
B) @parameter rate the rate of interest 
C) @param interestRate the rate of interest 
D) @parameter interestRate the rate of interest

Question 19

If a method has two parameters, one explicit and one implicit, and a return type of void, then the documentation comments should include:

Accepted Answer

A) One @param statement, and one @return statement 
B) Two @param statements, and one @return statement 
C) One @param statement, and no @return statement 
D) Two @param statements, and no @return statement 
A) One @param statement, and one @return statement 
B) Two @param statements, and one @return statement 
C) One @param statement, and no @return statement 
D) Two @param statements, and no @return statement

Question 20

Complete the following tester program by choosing the line that prints the expected outcome.

Accepted Answer

A) System.out.println("Expected: 1000"); 
B) System.out.println("Expected: 2000"); 
C) System.out.println("Expected: 2000") 
D) println("Expected: 2000"); 
A) System.out.println("Expected: 1000"); 
B) System.out.println("Expected: 2000"); 
C) System.out.println("Expected: 2000") 
D) println("Expected: 2000");

Exam 3: Implementing Classes

In the statement below, amount is referred to as the ____ parameter. public void deposit(double amount)

Which of the following corresponds to a valid constructor header for the Player class?

The black boxes from which a program is manufactured are called ___.

Consider the following method comment and method header: Fill in the blank.

Fill in the first line of this SquareTester program so that it declares and initializes a variable mySquare as an instance of a Square class with a side length of 6.

Assume the method below has been added to the BankAccount class.

We want to create a class that represents a date.A date has a day, month, and year.For example, the date March 16, 2014 has the day 16, month 3, and year 2014.The basic framework of a date class is below: Which of the constructor specifications below will allow this code to behave as desired?

What will be output from the following statements that use BankAccount class?

What is a tester class?

.Consider the following method comment and method header: Fill in the blank.

What is the name of the parameter variable of the recordPurchase method of the CashRegister class?

What verifies that a class works correctly in isolation, outside a complete program?

Which line of code is part of the private implementation of the BankAccount class?

Which of the following corresponds to the getArea method body for a Square class where the instance variable is named sideLength?

Fill in the blank in the following method comment.

What is a local variable?

Consider the following method header: Fill in the blank in the javadoc comment:

If a method has two parameters, one explicit and one implicit, and a return type of void, then the documentation comments should include:

Complete the following tester program by choosing the line that prints the expected outcome.

Introduction

Using Objects

Fundamental Data Types

Decisions

Loops

Arrays and Array Lists

Designing Classes

Inheritance

Interfaces

Input/Output and Exception Handling

Object-Oriented Design

Recursion

Sorting and Searching

The Java Collections Framework

Basic Data Structures

Tree Structures

Generic Classes

Stream Processing

Graphical User Interfaces

Advanced Input/Output

Multithreading

Internet Networking

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